Improvement in dividers



A.GRUBER.

DIVIDERS..

N0.181,-331. I Patented Au -22,1876;

N-PEY'ERS. PHOTO-LITHOGRIPNER, WLSHINGTUN. D C.

STATES PATENT OFFICE.

ADOLPHE GRUBER, or BOSTON, MASSACHUSETTS, ASSIGNOR TO L. PRANG a 00., OF SAME PLACE.

IMPROVEMENT IN DIVIDERS.

Specification forming part of Letters Patent No. 1 81,331, dated August 22, 1876; application filed April 24,1876.

To all whom it may concern:

Be it known that I, ADOLPHE GRU'BER, of Boston, of the county of Suffolk andState of Massachusetts, have invented a new and useful Improvement in Drawing Dividers or Compasses; and do hereby declare the same to be fully described in the following specification, and represented in the accompanying drawings, of Which- V Figures 1 and 2 are opposite side views of the instrument. Fig. 3 is an inner side view, and Fig. 4 a transverse section, of its pointed limb to. Fig. 5 is a longitudinal section, and Fig. 6 an inner side view, of its socketed or tubular and slotted limb b, with its tubular pen-carrier and pointed pencil-holder. Fig. 7 is a side view, and Fig.8 an upper end view, of the pen-carrier.

The main part A of the instrument is composed of two limbs, a b, or such and a handle, 0, arranged as shown, and hinged or pivoted together at one end of each, their pivot being represented at d. These limbs are made of sheet metal, one-viz, a-being trough-shaped or recessed, to receive the other, b, when folded down upon it. Furthermore, the limb a terminates in or is provided with a compasspoint, e, extended from it, as shown. The other limb b is tubular, and on its inner side is slotted from end to end, as shown at 19. At its free end it has a long grooved or concavoconvex projection, f, extended from it, to receive a similar projection, g, extended from one side the pen-carrier B. This pen-carrier is a tube slotted lengthwise, and provided at one end with a socket, r, to receive and hold a writing-pen, 0. At its other end, and so as to extend over the slot i, as shown, is a concavo-convex or troughed projection, k, which is intended as a cover to the compass-point 6 when the pen-carrier -is run pen foremost into the tubular limb b, and the two limbs are closed together.

Within the pen-carrier is a reversible pencil-holder, D, provided with a compass-point, 1, extended fromit, as shown. This pencilholder is tubular, and slitted lengthwise, it being to hold a pencil, E, inserted in its openend.

The pencil-holder is furnished with a projection, m, extended from it through the slot of the pen-carrier, such projection being to enable a person, by pushing against it, to move the pencil-holder either way in the pencarrier, in order to advance the compass-point or the pencil sufficiently beyond the said carrier for use, the projection m bringing up against either the pen-socket or the projection It.

On inserting the pen-carrier, pen-socket foremost, into the limb b, and closing the two limbs a I) together, the projection 70 will receive and cover the compass-point e, and the projection y will enter the projection f and stop the point of the pen from being pushed against the handle 0, to the injury of such point.

On reversing the pen-carrierthat is, on shoving it, open end foremost, into the leg bthe projection 9 may be made to enter the projection f, so as to stop the pen, or the compass-point l, or pencil, in the right position for being used with the point e for plotting or drawing.

The instrument above described, made mostly of sheet metal, can be manufactured very cheaply, and afforded at a small price to draftsmen, mechanics, or others. It can be folded together so as to be carried in the vest-pocket without danger of injury to the same.

'1. The comhinationof the troughed limb or, provided with the compass-point c, with the slotted and tubular limb I), provided with the concavo-convex projection f, to receive the projection g of the pen-carrier, such limbs a I) being pivoted together or to a handle at their upper ends,as set forth. p

2. The tubular pen-carrier B, provided with the pen-socket r and the projection g, arranged as set forth.

3. The slotted tubular pen-carrier B, provided with the pensocket r, and the compasspoint cover is, arranged as shown.

4. In combination with the part A, as described, the removable tubular and slotted pen-carrier B, and the removable reversible compass-pointed pencil-holder D, all constructed and arranged substantially as set forth.

ADOLPHE GRUBER. Witnesses:

R. H. EDDY, J. R. SNOW. 

